Flávio Bolsonaro win the second round of the 2026 Brazilian presidential election by 4-8% priced at 39.5% on Polymarket

Polymarket priced a Flávio Bolsonaro victory by 4-8% in the second round of the 2026 Brazilian presidential election at 39.5%, according to the supplied market update published Oct 24, 2026, at 5:24 PM ET. The contract rose 9.0 probability points over 24 hours, with $974K traded.

The price was also 4.0 points higher than on Oct. 21. Those changes cover different periods and should not be added together.

A specific margin, not an overall victory forecast

The contract concerns a particular winning-margin range. Its 39.5% price therefore represents the market’s assessment of a Flávio Bolsonaro win by 4-8%, rather than his probability of winning the election by any margin.

The supplied material does not identify a poll, campaign development or other event behind the increase. It establishes a repricing, but not what prompted traders to change their positions.

How the movement is measured

According to predictionbubbles.net, its movers board compares prices over 24 hours using probability-point changes, rather than relative percentage gains. It draws prices from Polymarket and Kalshi and refreshes every 15 minutes; the supplied source records a venue-data snapshot dated 24 Oct 2026, 21:43 UTC.

The outlet ranks eligible markets by the size of their price changes, without allowing trading volume or liquidity to affect that ordering. The $974K traded provides context for this contract’s activity, but the supplied update does not establish order-book depth or explain how trading was distributed during the move.

What it means for prediction markets

• Keep the outcome narrow: The 39.5% price applies to the 4-8% winning-margin band, not to a general Bolsonaro victory.
• Separate the comparison windows: The 9.0-point daily increase and 4.0-point rise since Oct. 21 describe different intervals.
• Distinguish price action from evidence: The move shows a change in market pricing; the provided material offers no independent electoral development explaining it.
• Volume is not liquidity: The reported $974K traded does not, by itself, establish how easily additional orders could be executed without moving the price.